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Sequoia %6rti80 Chesapeake Drive Redwood City,C,1md063 (650)364-9600 FAX(650)364-9233 <br /> 404 N.Wiget Lane Walnut Creek.CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0[00 <br /> 4„D- 455 McDowell Blvd.North,Ste.D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical '551 Industrial Road San Carlos,CA 94070-4t f 1 (650)232-9600 FAX(650)Z32-9612 <br /> e <br /> Etvlc�ly.r. .......... ................... <br /> Pinnacle �- ..'�....... "CEienf`Pro e6HD..::.:::ARCO2��86 <br /> 3939 Cambridge Rd., Ste. 220 Matrix. Soil <br /> s Cameron Park, CA 95682 <br /> >A#tentiorl Mark Capps QC Sample Group: S906330 Reported: Jun 23 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 7420 <br /> Analyst: D. Newcomb D. Newcomb D. Newcomb D.Newcomb T.Le <br /> Concentration <br /> Spiked: 0.80 mg/kg 0.80 mg/kg 0.80 mg/kg 2.4 mg/kg 50 mg/kg <br /> LCS Batch#: 5LCS062299 5LCS062299 5LCS062299 5LCS062299 LCS062299 <br /> Date Prepared: 06/22/99 06/22/99 06/22/99 06122/99 06/22/99 <br /> Date Analyzed: 06/22/99 06/22/99 06/22/99 06122/99 06/23/99 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 MV-1 <br /> LCS % <br /> Recovery: 93 93 91 96 90 <br /> Control Limits: 50-150% 50-150% 50-150% 50-150% 80-120% <br /> .....r......................:..................:.:..:...........:.r...}...........,....:.................,.........:..............................................iAGxiJi=.;::rf�:i:�::::}:::.:-;.�';: ::::�:::ct::::y;�:�:;:;::::'4':iso?::�:�:t:'S::,:;:r:j:.'-�:;`:j:�`1k:=i:k':<':4::::>:;.:::t:ti?:F;r<t:YY'i::''>::,•• <br /> MS/MSD <br /> Batch #: 9061671 9061671 9061671 9061671 9061707 <br /> Date Prepared: 06/22/99 06/22/99 06/22/99 06/22/99 06/22/99 <br /> Date Analyzed: 06/22/99 06/22/99 06/22/99 06/22/99 06/22/99 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 MV-1 <br /> Matrix Spike <br /> % Recovery: 100 100 100 104 100 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 99 99 99 100 100 <br /> Relative % <br /> Difference: 1.3 1.3 1.3 4.1 0.0 <br /> SB OIA ANALYTICAL Please Note: <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples. The LCS%recovery data is used for <br /> validation of sample batch results. Due to matrix effects,the QC limits for MSIMSD's are advisory only <br /> Ronald W. Bobe[ and are not used to accept or reject batch results. <br /> Project Manager/Sacramento abor <br /> S906330.PCP <5> <br />